Thanks + BRAINLIST

Please need correct answer asappp

Answer:

B and D

Explanation:

If it has letters.

Answer:

B. 45.0 kg

Explanation:

On earth the object has ;

Mass = 45 kg

acceleration = 9.81 m/s²

On Jupiter, acceleration is  24.79 m/s²

The mass of this object on Jupiter will be 45 kg. It will not change. Mass of an object will only change when you remove part of the object from it or add to it another part. The mass is the same on Earth and on Jupiter. However, due to increased acceleration on Jupiter , the weight will change/ increase because;

Weight = mass * acceleration

On Earth

Weight of the object will be : 45 *  9.81 = 441.45 kg

On Jupiter

Weight of the object will be : 45*24.79 =1115.55 kg

Answer:

The atom is now a negative charge

Explanation:

Adding electrons makes things negative.

Answer:

A. 2.5 m/s²

B. 4.29 m/s²

Explanation:

A. Determination of the acceleration.

Mass (m) = 28000 Kg

Force (F) = 70000 N

Acceleration (a) =?

Force (F) is simply defined as the product of mass (m) and acceleration (a). Mathematically, it is expressed as:

Force (F) = mass (m) × acceleration (a)

F = ma

Divide both side by m

a = F / m

With the above formula, we can obtain the acceleration as follow:

Mass (m) = 28000 Kg

Force (F) = 70000 N

Acceleration (a) =?

a = F / m

a = 70000 /28000

a = 2.5 m/s²

B. Determination of the acceleration.

Mass (m) = 28000 Kg

Force (F) = 120000 N

Acceleration (a) =?

a = F / m

a = 120000 /28000

a = 4.29 m/s²

Explanation:

There is a force of 3N acting towards the left and 2 forces of 4N each acting towards the right.

Net force = (4N) + (4N) - (3N) = 5N towards the right.

P.S. We subtract the 3N force because the forces are in opposite directions.

Answer:

12.6

Explanation:

Answer:

No. of electrons = 88

Explanation:

Given that,

No. of protons = 88

No. of neutrons = 226

We need to find the number of electrons it have in a radium atom.

In an atom, the number of protons is equal to the number of electrons. There are 88 protons in this case.

Hence, there are 88 electrons in the radium atom.

Answer: the formula for momentum is velocity times mass

car :

350 x 20 = 7000

truck:

400 x 17.5 = 3000

Ans : Car has a greater momentum

Explanation: Please mark Brainlest

Answer:

P = 53375[W]

Explanation:

First, we must use the following equation of kinematics, which allows us to calculate the acceleration value.

[tex]v_{f}=v_{o}+a*t[/tex]

where:

Vf = final velocity = 34 [m/s]

Vo = initial velocity = 27 [m/s]

a = acceleration [m/s²]

t = time = 6 [s]

Now replacing:

[tex]34=27+a*6\\a=1.167[m/s^{2} ][/tex]

Now we must use Newton's second law, which tells us that the sum of forces is equal to the product of mass by acceleration. In this way, we have the following equation.

ΣF =m*a

where:

F = force [N]

m = mass = 1500 [kg]

a = acceleration = 1.167 [m/s²]

[tex]F=1500*1.167\\F=1750[N][/tex]

Power is defined as the product of force by speed. But we have two speeds, the initial and the final. We must use the average speed to be able to estimate the power needed.

[tex]V_{average}=\frac{34+27}{2} =30.5[m/s][/tex]

And the power:

[tex]P=F*V_{average}\\P=1750*30.5\\P=53375[W][/tex]

Answer:

4kg

Explanation:

Given parameters:

Kinetic energy  = 1.6J

Velocity  = 0.2m/s

Unknown:

Mass of the body = ?

Solution:

The kinetic energy of a body is the energy due to the motion of the body.

It is mathematically expressed as;

  Kinetic energy = [tex]\frac{1}{2}[/tex]  m v²

m is the mass

v is the velocity

          1.6  =  [tex]\frac{1}{2}[/tex]  x 0.2 x v²  

          1.6  = 0.1v²

         v²   = 16

          v  = 4kg

Answer:

Blue

Explanation:

The colors of the rainbow are known by the acronym; ROYGBIV.

This is;

Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

From research, their respective wavelengths on the average are;

Red: 665 nm

Orange; 630 nm

Yellow; 600 nm

Green; 550 nm

Blue; 470 nm

Indigo; from 445nm to 464 nm

Violet; less than 400 nm

This means that from Red to Violet in that order, wavelength is decreasing in a descending order.

Now in refraction, the light with shortest wavelength will be bent the most while that with longest wavelength will be bent the least.

Thus, violet bends the most.

However, violet is not included in the options. So the next one that will bend the most after violet among the options given is Blue.

Answer:

4.71m/s

Explanation:

Given parameters:

Distance covered  = 40.5m

Time taken  = 8.6s

Unknown:

Speed  = ?

Solution:

The speed of Samantha is the distance divided by the time taken.

  Speed  = [tex]\frac{Distance}{time}[/tex]  

 Now insert the parameters;

   Speed  = [tex]\frac{40.5}{8.6}[/tex]   = 4.71m/s

Answer:

D. F = 24000[N]

Explanation:

To be able to calculate the force we must first find the pressure at the bottom of the tank. By means of the following equation:

[tex]P=Ro*g*h[/tex]

where:

Ro = density of the liquid = 800 [kg/m³]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 1.2 [m]

[tex]P=800*9.81*1.2\\P=9417.6[Pa][/tex]

Pressure is defined as the relationship between Force on the area.

[tex]P=F/A\\F=9417.6*2.5\\F = 23544 [N] = 24000[N][/tex]

Answer:

C.) 7.9 km

Explanation:

Distance and Displacement

An object who constantly travels for some distances at defined periods of time has a total distance as the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.

Dr. Suarez walks 2.8 km north and then 5.1 km south. The total distance is simply the sum of both distances: 2.8 km + 5.1 km = 7.9 km.

Note the distance does not have any direction (north or south), it's just the number.

Answer: C.) 7.9 km

Answer:

6.2 ×10^-25

Explanation:

Ma = mg

a = (m/M)g

[tex]a = \frac{0.38}{5.98 \times {10}^{24} } \times 9.8 = 6.2 \times {10}^{ - 25} [/tex]

Answer:

•marine biology.

Explanation:

A mechanical engineer is a professional individual who ensures the design of a mechanical assembly as well as the monitoring of its realization. His role involves the manufacturing of a prototype and developing new products for the company. Responsible for manufacturing, he advises the company and customers and assesses the risks and techniques used for its development. Finally, he supervises the installation and the market penetration of the product, as well as its maintenance.

A mechanical engineer can collaborate with many useful and complementary professions such as designers or marketers, it ensures the appearance and technical operation of the product. It is a job under high responsibility with projects that can be large.

Finally, he can also work in the construction sector, in the automotive industry, biomechanics, shipbuilding, aerospace production and aeronautics, railways, mechanics and metallurgy, robotics, textile machinery, etc.

Answer:

d. Two soccer balls that are touching each other

Explanation:

Let [tex]m_1[/tex] be the mass of a tennis ball, [tex]m_2[/tex] is the mass of a soccer ball.

As the mass of a soccer ball is more than the mass of a tennis ball, so

[tex]m_2 > m_1[/tex]

Let [tex]d_1[/tex] be the distance between the centers of both the balls near each other and [tex]d_2[/tex] be the distance between the centers of both the balls touching each other.

So, [tex]d_2 > d_1[/tex]

The gravitational force, F, between the two objects having masses M and m and separated by distance d is

[tex]F=\frac{GMm}{d^2}[/tex]

Where G is the universal gravitational constant.

As, the gravitational force is directly proportional to the product of both the masses and inversely proportional to the square of the distance between them,  so selecting the larger mass ([tex]m_2[/tex], soccer ball) separated by a lesser distance ([tex]d_2[/tex], touching) to get more gravitational force.

Therefore, there will be a larger gravitational force between them when two soccer balls touching each other.

Hence, option (d) is correct.

Answer:

Two soccer balls that are touching each other

Explanation:

I got it right on the test.

Answer:

12.5

Explanation:

If the half life is 25 days then in 50 days it will half twice

50/2=25

25/2=12.5

Answer:

2 and 5

Explanation:

Answer:

W = 237825 [J]

Explanation:

Work in physics is defined as the product of force by the distance that the body travels.

The work can be calculated by means of the following equation.

[tex]W =F*d[/tex]

where:

W = work [J] (units of Joules)

F = force = 3150 [N]

d = distance = 75.5 [m]

Now replacing:

[tex]W=3150*75.5\\W=237825 [J][/tex]

Answer:

✔ convergent

Explanation:

Answer:

B ( Convergent)

Explanation:

Answer:

Distance 50m

final velocity 20ms^-1

[tex]s = ut + \frac{1}{2} a {t}^{2} \\ = 0 \times t + \frac{1}{2} \times 4 \times {5}^{2} = 50m[/tex]

[tex]v = u + at \\ v = 0 + 4 \times 5 \\ v = 20ms^{ - 1} [/tex]

Given that,

Initial velocity of the airplane = 66 m/s

Distance = 560 m

Final velocity of the airplane = 0 (stops)

To find,

Acceleration of the airplane.

Solution,

Let us consider that a is the acceleration of the airplane. We can find it using third equation of motion as follows :

[tex]v^2-u^2=2as\\\\a=\dfrac{v^2-u^2}{2s}\\\\a=\dfrac{0^2-66^2}{2(560)}\\\\a=-3.9\ m/s^2[/tex]

Therefore, the acceleration of the airplane is [tex]-3.9\ m/s^2[/tex]

Answer:

b

Explanation:

Answer:

The absorption of water and minerals by taproot is more efficient with the taproot system. Fibrous root absorbs water more efficiently as it reaches deep into the soil. Taproots are capable of withstanding drought.

Answer: it’s b

Explanation:

I had two attempts to do the test first I picked c but I did it again it’s b .

Answer: A  a mechanical wave travels through empty space, while an electromagnetic wave travels through matter.

Explanation: A mechanical wave travels through empty space, while an electromagnetic wave travels through matter. A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.